Carbon dots crosslinked chitosan/cellulose sponge capture of methyl blue by an adsorption process. (28th May 2021)

• Record Type: Journal Article
• Authors: Lu, Shiyan; Yuan, Guangzhi; Zhu, Yongfei; Yu, Shujuan
• Is Part Of: Luminescence. Volume 36:Number 6(2021)
• Page Start: 1459
• Page End: 1468
• Publication Date: 2021-05-28
• Subjects: carbon dots -- chitosan -- dye adsorption -- microcrystalline cellulose -- sponge; Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.4089
• Languages: English
• ISSNs: 1522-7235

Abstract

Abstract: For environmental protection, organic dyes and solvents of industrial wastewater must be eliminated. Here, a citric acid‐based carbon dots (CA‐CDs) crosslinked chitosan/microcrystalline cellulose (CS/MCC/CA‐CDs) sponge was synthesized to study its adsorption performance for methyl blue (MB) dye. The morphology of the sponge was a tangled fibre with a bundle formed by hydrogen bonds between CA‐CDs and the CS/MCC composite matrix. The abundant amount of tangled fibre bundle units can offer plentiful active adsorption sites to collect the dye molecules. The adsorption capacity of the CS/MCC/CA‐CDs sponge toward MB was 306.8 mg/g at pH 10 and a temperature of 298 K. In addition, the pseudo‐second‐order kinetic model was matched with the adsorption kinetic experimental data, and the adsorption isotherm data can be described by the Langmuir models. This study proposed that the CS/MCC/CA‐CDs sponge adsorbent creates tremendous potential application value in wastewater treatment due to its fast kinetics, high adsorption capacity, simple preparation, and eco‐friendly properties. Abstract : Fluorescent carbon dots (CA‐CDs) were synthesized from N ‐(2‐aminoethyl)ethanolamine and citric acid, and then crosslinked with microcrystalline cellulose and chitosan to prepare new composite sponges (CS/MCC/CA‐CDs), which were used in the adsorption of methyl blue (MB). CS/MCC/CA‐CDs showed maximum adsorption capacity of 306.8 mg/g for MB dye, The adsorption process followed Langmuir and pseudo‐second‐order models.